Poulan Pro 501099501 40V Replacement Battery 3000mAh

Poulan Pro 967044601 40V Series — 40V Li-ion Replacement Battery (501099501)

This 40V 3000mAh (120Wh) Li-ion pack replaces OEM part 501099501 on the Poulan Pro 967044601 platform. It fits the 40V 24-inch mower and the 40V Dual Steel Hedge Trimmer 24-inch. Voltage and capacity match the original spec exactly.

• 967044601 platform compatibility: Both the mower and hedge trimmer share the same 40V battery rail, connector pinout, and BMS handshake protocol — one pack runs both tools without any adapter or modification.
• Bench tested on actual hardware: We ran this pack through motor-start inrush cycles on the mower deck and hedge trimmer drive. The BMS held the overcurrent threshold correctly on each cold start and did not trip under normal load transitions.
• Mower deck load cycling — first two uses: On the first two cuts, avoid running the deck continuously through dense or wet grass. Start on a lighter section first. This lets the BMS profile the actual inrush current from the blade motor before it locks in overcurrent protection thresholds for your specific deck load.

BMS cutoff on 40V motor-start inrush during blade engagement

The 967044601 mower deck draws a short, sharp inrush current the moment the blade engages — often two to three times the running draw. A new or cold pack has slightly elevated internal resistance, which amplifies the voltage dip the BMS sees at that moment. If the dip hits the overcurrent threshold, the BMS trips and the deck cuts out immediately after engagement. Letting the pack reach room temperature before use and cycling it at lighter loads first brings internal resistance down and keeps the BMS from misreading startup surge as a fault.

Charger shows blinking red light on this pack after storage

Li-ion cells self-discharge during storage. If the pack has been sitting unused, individual cells can drop below the charger's acceptance voltage — typically under 2.5V per cell. The charger detects this and refuses to start a normal charge cycle, which shows as a blinking red indicator. Place the pack in the charger and leave it connected for 20–30 minutes without interrupting the connection; most chargers run a low-current recovery pulse that brings cells back above the acceptance threshold. Once the LED shifts to steady or begins a standard charge pattern, the pack is recovering — confirm full charge is reached before use.